workspace/kwin/effects/blur.h

   1 /********************************************************************
   2  KWin - the KDE window manager
   3  This file is part of the KDE project.
   4
   5 Copyright (C) 2007 Rivo Laks <rivolaks@hot.ee>
   6
   7 This program is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2 of the License, or
  10 (at your option) any later version.
  11
  12 This program is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 *********************************************************************/
  20
  21 #ifndef KWIN_BLUR_H
  22 #define KWIN_BLUR_H
  23
  24 // Include with base class for effects.
  25 #include <kwineffects.h>
  26
  27 #include <QRegion>
  28
  29 template< class T > class QVector;
  30
  31
  32 namespace KWin
  33 {
  34
  35 class GLRenderTarget;
  36 class GLTexture;
  37 class GLShader;
  38
  39 /**
  40  * Blurs the background of translucent windows
  41  **/
  42 class BlurEffect : public Effect
  43     {
  44     public:
  45         BlurEffect();
  46         ~BlurEffect();
  47
  48         virtual void prePaintScreen( ScreenPrePaintData& data, int time );
  49         virtual void paintScreen( int mask, QRegion region, ScreenPaintData& data );
  50
  51         virtual void prePaintWindow( EffectWindow* w, WindowPrePaintData& data, int time );
  52         virtual void drawWindow( EffectWindow* w, int mask, QRegion region, WindowPaintData& data );
  53
  54         static bool supported();
  55
  56     protected:
  57         bool loadData();
  58         GLShader* loadShader(const QString& name);
  59         void updateBlurTexture(const QVector<QRect>& rects, double blurAmount );
  60         void updateBlurTexture(const QRegion& region , double blurAmount );
  61
  62         QRegion expandedRegion( const QRegion& r ) const;
  63
  64     private:
  65         GLTexture* mSceneTexture;
  66         GLTexture* mTmpTexture;
  67         GLTexture* mBlurTexture;
  68         GLRenderTarget* mSceneTarget;
  69         GLRenderTarget* mTmpTarget;
  70         GLRenderTarget* mBlurTarget;
  71         GLShader* mBlurShader;
  72         GLShader* mWindowShader;
  73         bool mValid;
  74         int mBlurRadius;
  75
  76         int mTransparentWindows;
  77
  78         QRegion mBlurDirty;
  79         QRegion mScreenDirty;
  80
  81         QRegion mBlurMask;
  82     };
  83
  84 } // namespace
  85
  86 #endif